Oxidation Resistance Matching: Thermocouple Anti-Kev laus thev naus laus zis rau tooj liab rhaub
Copper heaters yog dav siv nyob rau hauv nruab nrab -tsawg kub precision cua sov scenarios, tab sis ntev - lub sij hawm ua hauj lwm tas mus li yog feem ntau oxidation nto thiab corrosion me ntsis. Kev saib xyuas feem ntau yog tsom rau kev tu cov txheej tooj liab oxide, thaum tsis quav ntsej txog cov teeb meem kev laus ntawm kev txhawb nqa thermocouples. Copper oxidation yuav hloov qhov chaw tshav kub hloov pauv ntawm cov cua sov, ua rau qhov ntsuas kub tsis sib haum rau cov lus pom zoo. Nyob rau hauv cov xwm txheej hnyav, sensor sojntsuam oxidation ua rau kev txav mus tas li, txo qhov ntev - lub sijhawm ruaj khov ntawm tag nrho cov cua sov.
Raws li ntawm - qhov kev paub dhau los ntawm qhov chaw ua haujlwm, cov cua sov tooj liab yuav tsim cov yeeb yaj kiab oxide ntom ntom rau saum npoo tom qab ntev - lub sijhawm ua haujlwm siab tshaj 200℃. Cov txheej txheej oxide muaj cov thermal tiv taus ntau dua li cov ntshiab tooj liab matrix, ua kom cov cua sov ua kom nrawm nrawm thiab ua rau lub tshuab cua sov siab tshaj qhov ntsuas qhov ntsuas kub. Ordinary thermocouples tsis tuaj yeem txheeb xyuas cov kev hloov pauv cua sov uas tshwm sim los ntawm cov txheej txheem oxide, uas ua rau qhov ntsuas kub tsis tu ncua kev sib txawv thiab maj mam siv zog nce ntxiv.
Ordinary hlau-constantan J- hom thermocouples yog nquag oxidation aging nyob rau hauv nruab nrab- kub ib puag ncig, nrog ceev teeb liab drift tom qab hu rau tooj liab oxide volatile tshuaj. Copper-constantan T- hom thermocouples muaj oxidation zoo heev nyob rau hauv nruab nrab- qhov kub thiab txias ib puag ncig, ruaj khov thermoelectric kev ua tau zoo, thiab tuaj yeem hloov mus rau ntev- lub sij hawm ua hauj lwm ntawm me ntsis oxidized tooj liab cua sov yam tsis muaj qhov pom tseeb tseeb attenuation.
Kev sib txuam raws sij hawm ntawm kev tiv thaiv kev tiv thaiv - oxidation thermocouples thiab cov txheej txheem oxidation tsis tu ncua ua ib qho kev tiv thaiv dual rau cov tshuab cua sov tooj. Hom kev sib txuas no ua haujlwm tau zoo zam kev ua haujlwm tsis zoo los ntawm cov khoom siv laus thiab txuas ntxiv mus rau tag nrho - kev pabcuam ntawm cov khoom siv cua sov.
|
Lub sijhawm ua haujlwm |
Copper rhaub Oxide Thickness |
T-Type Thermocouple Drift |
J-Type Thermocouple Drift |
System Temperature Deviation |
|---|---|---|---|---|
|
3 Lub Hlis Kev Ua Haujlwm tsis tu ncua |
0.02 hli |
0.2 degree |
0.5 degree |
0.3℃/ 0.8 degree |
|
6 Lub Hlis Kev Ua Haujlwm tsis tu ncua |
0.05 hli |
0.4 degree |
1.1 degree |
0.5℃/ 1.4 degree |
|
12 Lub Hlis Kev Ua Haujlwm tsis tu ncua |
0.09mm ib |
0.7 degree |
1.9 degree |
0.8℃/ 2.2 degree |
|
18 Lub Hlis Kev Ua Haujlwm tsis tu ncua |
0.13mm ib |
1.0 degree |
2.8 degree |
1.2℃/ 3.1 degree |
Los tiv thaiv - oxidation txuam thiab kev saib xyuas tsis tu ncua muaj txiaj ntsig ncua kev laus nrawm ntawm tooj liab cua sov tshuab. Siab -ruaj khov thermocouple configuration adapts mus rau gradual oxidation yam ntxwv ntawm cov ntaub ntawv tooj liab, tuav ntev -lub sij hawm tswj qhov kub thiab txias. Standardized oxide tu lub voj voog tshem tawm cov teeb meem hloov hluav taws xob thiab rov qab ua kom muaj cua sov ua kom zoo ntawm cov cua sov tooj liab.
Customized anti-aging matching schemes tuaj yeem tsim raws li cov khoom siv ua haujlwm thiab ib puag ncig kom paub txog ntev- lub sijhawm ua haujlwm ruaj khov ntawm precision tooj liab cua sov tshuab.
